Submission #741183

#	Time	Username	Problem	Language	Result	Execution time	Memory
741183		Charizard2021	Combo (IOI18_combo)	C++17	100 / 100	30 ms	576 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
	string cur = "";
	if(press("AB") >= 1){
        cur = press("A") ? "A" : "B";
    }
	else{
        cur = press("X") ? "X" : "Y";
    }
	vector<char> characters = {'A', 'B', 'X', 'Y'};
	characters.erase(find(characters.begin(), characters.end(), cur[0]));
	while((int)cur.size() <= N - 2){
		int query = press(cur + characters[0] + characters[0] + cur + characters[0] + characters[1] + cur + characters[1] + characters[0]);
		if(query == cur.size()){
			cur.push_back(characters[2]);
		}
		else if(query == cur.size() + 1){
			query = press(cur + characters[1] + characters[2]);
			if(query == cur.size()) cur = cur + characters[0] + characters[2];
			else if(query == cur.size() + 1) cur = cur + characters[1] + characters[1];
			else cur = cur + characters[1] + characters[2];
		}
		else{
			query = press(cur + characters[0] + characters[1]);
			if(query == cur.size()) cur = cur + characters[1] + characters[0];
			else if(query == cur.size() + 1) cur = cur + characters[0] + characters[0];
			else cur = cur + characters[0] + characters[1];
		}
	}
	while(cur.size() != N){
		if(press(cur + characters[0]) == cur.size() + 1){
            cur.push_back(characters[0]);
        }
		else if(press(cur + characters[1]) == cur.size() + 1){
            cur.push_back(characters[1]);
        }
		else cur.push_back(characters[2]);
	}
	return cur;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:16:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   if(query == cur.size()){
      |      ~~~~~~^~~~~~~~~~~~~
combo.cpp:19:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |   else if(query == cur.size() + 1){
      |           ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:21:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |    if(query == cur.size()) cur = cur + characters[0] + characters[2];
      |       ~~~~~~^~~~~~~~~~~~~
combo.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |    else if(query == cur.size() + 1) cur = cur + characters[1] + characters[1];
      |            ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:27:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |    if(query == cur.size()) cur = cur + characters[1] + characters[0];
      |       ~~~~~~^~~~~~~~~~~~~
combo.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |    else if(query == cur.size() + 1) cur = cur + characters[0] + characters[0];
      |            ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:32:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |  while(cur.size() != N){
      |        ~~~~~~~~~~~^~~~
combo.cpp:33:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   if(press(cur + characters[0]) == cur.size() + 1){
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:36:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |   else if(press(cur + characters[1]) == cur.size() + 1){
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95